Coin-actuated locking device for telephones



- A1,614,677 Jan' 18 1927' F. l.. LocKwooD COIN ACTUATED LOCKING DEVICE FOR TELEPHONES original FileCl Oct- 22. 1925 nuen'l'or. E E/an/' lLLacrwo/Qd, @y 7M Mm M Patented Jan. 18, 1927.

UNITED STATES FRANK L. LOCKWOOD, OIEl WASHINGTON, DISTRICT 0F COLUIBIA.

COIN-ACTUATED LOCKING DEVICE FOR TELEPHONES.

Application led October 22, 1925. Serial No. 64,215.

The` present invention relates to improvements in coin actuated locking attachments for telephones of the desk type, and aims to provide a constructon which 'will be simple and etiicient, and not likely to get out of order, whichmay be very economicall manufactured, and one that can be easi y applied to the telephone set by the ordinary user.

With these, and other objects in view, which will `hereinafter ap ear, the invention comprises the novel eatures of construction and arrangement and combination of parts hereinafter described, and particularl defined by the appended claims.

hat is atcpresent considered the referred embodiment of the invention is i lustrated in the accompanying drawings, in which Figure 1 is an elevation of the ordinary telephone set orstand, shown largely in a conventional manner, with the locking attachment in place thereon, and

Fig. 2 is a detail View, partly in section, showin the attachment asviewed from the ri ht o Fig. 1. y

ig. 3 is a detail vview also p'artl in section, as viewed from ,the rear of ig. 1.

Fig. 4 is a transverse vertical section taken just in front of or to the left of Fig. 6, of the member 7.

Fig. 5 is a vertical transverse section on the line between parts 6 and 7.

Fig. 6 is a section on line 6-6 of Fig. 4.

Fi 7 is a view similar to Fig. 6, but showing the parts in switch arm releasing position. s

Fig. 8 is a section on line 8-8 of Fig. 4, and showing the position of the parts with the key inserted in inverted position.

Fig. 9 is a similar section with the keyA inserted in reversed position, or right side pFig. 10 is a section on line 10-10 of Fig. 4, and

Fig. 11 is a similar section taken just above the dog orpmember 10.

Referring to the several iigures of this drawing by reference characters, the numeral 1 designates thev telephone stand having the usual transmitter 1,and receiver supporting switch l", which is automatically raised by the removal of the receiver 1 from the switch arm. 2 designates `a coin receptacle, which isl provided withl a door or removable closure 2a normall held closed by a suitable lock adapted to eunlocked by a ke to permit it to be opened for removal o the coins by the holder of the key.

This receptacle is provided at one side with a convex wall portion or recess 2b designed to fit against the upright portion or pedestal of the stand just below the switch arm, being clamped in position by a clam ingmember 3 which may be secured to t e receptacle wall in any convenient manner, as by means of bolts 4, the securing nuts of which may be located within the receptacle to prevent their removal except when the door is open.

The receptacle 2 is provided at one corner with an upstanding coin chute 5 which also carries the coin actuated mechanism hereinafter described, and which communicates with the coin receptacle by a coin slot 2, the bottom of the chute being inclined as shownto defiect the coin into the receptacle from the lower end of the chute.

Said bottom is made as a separate iece to permit the entry of the coin actuate parts, whereafter it may be riveted or brazed in position.

The upper end is rovided withY a recess or slot in which is slidably located a switch arm retaining member 6, the upper end of which is laterally recessed, as'indicated at 6 to engage the switch arm, as shown, it being understood that when the member 6 is free to move vertically, this switch arm willrise on removal of the receiver therefrom. y

Lying alongside of and 'cooperating with the member 6 is a member 7 having an elongated slot 7 therein, within which is pivotally mounted a coin actuated lever 8 having at its upper end a luvr or projection 8* designed to engage a shou der on the member 6, whichl shoulder may be conveniently and economically formed by the bottom edge of an opening 6*.

The lever 8 is acted on by a light spri 9, preferably coiled about the pivot pin 8 ofthe lever and having one end or arm bearing againstthe member 7 and the other against the lever. The lower yend 8b of the lever is deflected outwardly towards the wall of the vcoin chute and 1s so positioned andv proportioned that when a nickel has been inserted in the coin receiving slot 5 and drops downwardly under the action of avity, it will press the inclined or deflected ower end of the lever laterally and dislngage the lug 8a from the switch lever ding member, thereby unlocking or freeing said switch arm to permit the telephone to be operated-as before explained, and as shown in Fig. 6. 'The said lower end of the lever may be so positioned relative to the adjacent wall of the coin slot. that a thinner coin, such as a penny or dime will not move the lever into unlocking position.

At the lower end of the slot or recess 7 is a pivoted dog lO one edge of which normally projects into the path of the coin7 preventingit from passing` into the com receptacle after the releasing lever has been actuated and before the switch .lever has been raised, in which position said dog 10 is held by the lower end of the member 6 overlying and abutting against the upper face of the opposite end of said dog. When the receiver 1s removed from the hook and the switch arm raises the member 6, the dog 10 is 4"released and tipped by the weight or' the coin which is permitted to drop into the coin receptacle.

In order that the owner .of the telephone may use it without resorting to a coin for unlocking purposes, I provide the coin chute 5 with a key slot or opening 5b, preferably designed to admit the same key which unlocks the door of the coin receptacle. The

member 6 is provided with a transversegroove 6d in its face in alignment with the locking dog or projection 8, which latter projection is beveled or inclined at one side (Figs. 6 and l0), so that insertion of the key and pushing its end against the dog will cause the latter to release the member 6, the key slot 5b being of suiiicient lenotli that when the member 6 is released thebkey can move up with it.

. It is` desirable that means shall be provided wherebythe owner may, on leaving his ofice,lock the phone against coin controlled use.

To this end I provide the slide 6 with an L-shaped recess 6, Fig. 5, in which is pivoted a dog 11 havinv a laterally extending locking wing or projection 11 designedY to cooperate with a corresponding recess 7 b, in member Z (see Figs. 8 and 9).

Thelower portion of the dog 11 (right v handedge, Fig. 5) is provided with two reversely beveled portions shown-respectively .in full anddotted lines 1n "Fig 5, designed to cooperate with the end corner projection` with. which fiat keys are customarily provided. Y When the key is inserted right side up or with fits corner extension uppermost, and

' .pushed to 'the limit, saidcorner projection -acting on the upper incline willfswing the Aldo`g1.ex`1dor 'portion ljl-at into engagement with 'the recess 7v in element 7, as shown in Fig 9 To prevent the liability of the attachment being twisted on the phone standard l, in case the clamp is not suiiiciently tight, by which twisting action the switch arm might be freed from the slot 6, I provide the casing 5 with an integral extension 5x which olverlies and closes the open\side of the s ot.

From the foregoing, it will be seen that a vvery simple form of apparatus is provided and one which may be very economically manufactured, as all the main parts may be stamped vup or died out of sheet metal of `the requisite thickness and easily assembled and very little machine work is necessary.

Having thus described my invention, what I claim is 1. A telephone attachment of the class described, comprising a coin receptacle with means for securing it to a telephone stand,

said receptacle having a substantially vertically disposed coin chute casing communicfa-ting with said receptacle, a vertically slidable switch arm engaging member slidably guided by said coin chute casing and having a locking shoulder, a recessed member -lying alongside said switch arm engaging member and spaced 'from the adjacent wall of the coin chute casing to provide a coin passage` and a locking lever pivoted in said recess and having one end provided with a dog for engaging said shoulder, and "its other end lying normally in inclinedposition in said coin passage.

2. A telephone attachment of the class'described comprising a coin receiving receptacle with means for securing it to a telephone stand, said receptacle having an upla'. coin retaining member pivotally mounted j beneath the lower' end of said'lever and having one end projectinginto the path of the coin ,and its other end underlying the lower end of said switch arm'engagmg member.

3. A telephone attachment of the class described, comprising a coin..rece tacle with" means for securing it toa telep one stand,

Inn

said receptacle havin a substantially vertically disposed coin c ute casing communieating with said receptacle, a vertically slidable switch arm enga ing member slidably guided by said coin c ute casing and having a lockin shoulder, a recessed member lying alongside said switch arm engagin member and spaced from the adjacent wa of the coin chute casing to provide a coin passage, a locking lever ivoted in said recess and having one en provided with a dog 'for engaging said shoulder, and other end lying normally in inclined position in said coin passage, and key actuated means carried b said recessed member for'moving said locking lever to unlocking position.

4. A telephone attachment of the class described, comprising a coin rece tacle with means for securing it to a telep 'one stand, said receptacle having a substantially vertically disposed coin chute casing communi eating with said receptacle, a vertically slidable switch arm engaging member slidably guided by said coin chute casing and having a locking shoulder, a recessed member lying alongside said switch arm engaging member and s aced from the adjacent wall of the coin c ute casing to provide acoin passage, a locking lever pivoted in said recess and having one end rovided with a dog for engaging said shou der, and other end lying normally in inclined position 1n said coin passage, and key actuated means carried bg said recessed member for locking the switc arm engaging member thereto.

5. A telephone attachment of the class described comprising a coin receiving receptacle with means for securing it to a telephone stand, said receptacle having an upstanding coin chute communicating with said rece tacle, a switch arm engaging member slidall); ing a locking shoulder, a recessed member lyin alongside said locking member, a locking lever pivoted in said recess and having a dog engaging said shoulder and an inclined end lying in the path of the coin, said dog having an inclined side face, and said chute and switch arm engaging member having aligning key passages for insertion of a.

ush key to engage the inclined face of the 6. A telephone attachment of the class described, comprising a casing with means for ly guided by said chute and hav-- securing it to a telephone stand a vertically slidable member guided in said casing and having a laterall opening switch arm engaging recess an a coin actuated lever pivoted within t e casing and having a do engaging said member to normally restrain it from upward movement, said casing having an extension lying alon side the switch arm and closing the open si e of said recess. 7. A telephone attachment of the class described comprising a coin receivingreceptacle with means for securing it to a telephone stand, said receptacle having an upstanding coin chute communicating with said rece tacle, a switch armengaging member slida ly guided by said chute and having a lockin shoulder, a recessed member lying alongsi e said locking member, a locking lever pivoted in said recess and havin a dog engaging said shoulder, an incline end lying in the path of the coin, and means for locking the parts .against coin actuation comprising a dog pivoted in a recess in one of said members and adapted to engage :i i

recess in the other member, said dog having a part provided with reversely inclined cam faces at dierent elevations, there being a key slot leading to said cam faces whereby a key may be inserted to actuate said dog.

8.. A telephone attachment of the class described, comprising a coin receiving receptacle with means or securin it to a telephone stand, said receptacle iaving an upstanding coin chute communicating with said rece tacle, 'a switch arm engaging member s idably guided by said chute and having a locking shoulder, a recessed meinber lying alongside said locking member, a locking lever pivoted in said recess and having a dog engaging said shoulder, an inclined end lying in the path of the coin, and means for locking the parts against coin actuation comprising a dog pivoted in a recess in one of said members and adapted to enga e a recess in the other member, said do aving a art provided with reversely ,inc ined cam aces at different elevations,

there being a key slot leading to said cam faces whereby ,a ke may be inserted to actuate said dog, and riction means for holding said dog in either its locked or unlocked position.

In testimony whereof, I affix my signature.

, FRANK L. LOCKW OOD.

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